SWT 3000 Equipment Manual CLE Module
© SIEMENS AG 2008 Edition p3_3_x 08/09 Page - 5
If any faults should occur in the SWT 3000 unit errored signals must not under any circumstances
be transmitted to the distant station. For this reason the transmitter output can be short-circuited via
a relay. This relay is driven by the PU3 module (PON_PU signal) and only enabled if the unit is op-
erating properly.
Alarm displays
The alarm signals generated by the PU3 module are displayed via red LED on the front panel of
the SWT 3000. LED are provided for the following alarms:
LID2 LID1
LIA
OK
SAL
EAL
S/N
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SIEMENS
SWT 3000
Figure 4: Displays on the CLE module
1. Transmitter alarm SAL
2. Receiver alarm EAL
3. Signal/noise level alarm S/N
The signals are low active and are fed to the LED drive via an integrated inverter module with a
+5V supply voltage.
CLE Module
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